Syringe



Feb. 7, 1928( 1,658,296

L. s. MORGAN SYRI NGE Filed Dec. 15. 1926 gwuzntoz L. En. MDE an.

@M Y l n. l anonima" Patented F eb. 7, 1928.

UNITED STATES PATENT ioFi-fljcE.

LENGE s. MORGAN, orL KANSAS CITY, MISSOURI. i

sYJaINeE.

-` Application led'December 15, `1926. Serial No.'154,97 5.

i This invention relates to syringes andv more particularly to a'syringe adapted to inject ointments and liquid or .semi-liquid.

medicines into the nasal passageor other passages of the body andmay further be employed to inject antisepticy solutions or healing medicines into4 incisions formed when operating or resulting from injuries received in accidents.

At the present time syringes are employed for applying ointmentv and other medicines but they have been Vfound unsatisfactory as they cannot be readily inserted and also the quantityvofmedicine discharged from the syringe cannot be easily gaged. Therefore, one object of the invention is to provide a syringe having anelongated nozzle which may be easily inserted and a desired quantity of medicine discharged from the syringe.

. Another object of theinvention is to peri mit the syringe to be readily employed to `discharge either liquider a salve-like oint-y ment. Y

Another object of the invention is to prevent the piston of the syringe from having rotary kmovement in the barrel when a threaded stem is rotated or slid longitudinally in the barrel 'to 'impart movement to the piston.

Another object oit' the invention is to pro-` fvide a syringe, the parts Vof which are formed ofhard rubber andmay be readily taken apart and thoroughly cleaned. ,-The invention is illustrated inthe accompanying drawing, wherein y Figure lis 7a view showingthesyringe in side elevation;

Fig. 2 is a longitudinal sectional view through the syringe;

Fig. 3 is a transverse sectional View through the syringe taken on the line 3 3 of Fig. 2;

Fig. 4 is a transverse sectional on the line 4 4 of Fig.2;

Fig. 5 `is a transversek sectional view through the barrel of a syringe of a slightly modified construction, and j Fig. 6 is a view similar to Fig. .5 showing anothermodified formof barrel. f

The syringe constituting the subject-matview taken ter of this inventionzincludes a barrel 1,

tion 2 of the barrel is externally threaded and carries an internally threaded capv 3 formed with avcentrally disposed unthreaded j openingzfl.: The cap has its peripheralportion4 extended, as shownat 5, `and formed with a.; milled marginal edge 6jso that the cap'may be tightly screwed upon the.y barrel but readily removed therefrom when necesH sary. Theother kend porti-on of the barrel 1 which'may be referred to as its forward end is formed with a head 7 which tapers outwardly, and carries an ,elongated nozzle 8 having an axially `disposed bore 9 which communicates with the interner of the barrel. .The nozzle is formed integral with the head 7 and tapers towards its free end, as clearly shown in'F ig. 2, so that, when the protecting cap 10 isremoved and the syringe in use, the nozzle may be readily inserted without injury to the person using the same. ,e A piston, indicated in general by thenumeral 11, operates in the barrel 1 and consists of a cup' 12 formed of flexible material and disposed between disks 13 and 14 of hard rubber. The rcup and' the disks are 'formed with alined'. openings to receive a. threaded operatingstem 15, the stem being formed with a'left hand thread and the open-V Inorder to prevent the piston from rotatingl in the barrelthe two disks 13 anddlfarev provided with `marginal recesses infwhich portions of the flexible cup 12 arereceived, as shown in Fig. 3. These recesses accommodate longitudinally extending ribs 17 which extend longitudinally upon the walls of the barrel and allow the piston to slide freely longitudinally in thebarrel but very eii'ectively prevent the piston from rotating. If desired, thev ribs and grooves may be omitted and the barrel formed with a ground inner surface contacting with a ground peripheral edge face of the 'disk 1a to prevent the piston from rotating. It should also benoted that,

inv order to more positively preventrotation of the Apiston when 'the ribs and ygrooves are omitted, the barrelv may be elliptical, heX` agonal or any other desired non-circular shape in cross section, as shown in Figs. 5 and 6. A dish 18 is threaded upon the stem y15 above the piston and is formed with opposed flat side faces 19. These fiattene'd side faces are provided so that the disk 18 may be readily grasped from opposite sides and held stationary while the stem is rotated to adjust the disk longitudinally upon the stem. By this arrangement the disk may be disposed either close to the inner surface ot the cap to prevent longitudinal sliding of the stem or it may be moved away trom the cap, as shown in Fig. 2, in order to allow the stem to be moved longitudinally and impart a quick sliding movement to the piston instead of a slow movement. Flattene'd faces 2O are formed at opposite sides oit the head 16 so that the head may be readily grasped .and the stem drawn outwardly when the disk is disposed in spaced relation to the cap.

lVhen the syringe is in use, the barrel is filled with ointmentand when the cap is applied the stem may be rotated to move the piston towards the forward end oi' the barrel and force the ointment through the bore 9 of the nozzle 8. It the ointment is of a semiluid nature or liquid medicine is to be discharged from the syringe, the disk will be moved away trom the cap in order to permit the stem to be slid longitudinally through the cap and the piston moved rapidly in the barrel. It should be further noted that by properly adjusting the disk upon the stem the extent to which the piston may be moved by reciprocating the stem may be controlled. rlhis construction will, therefore, provide a gage so that a desired quantity of the medicine or ointment in the syringe may be easily discharged without danger of too great a quantity being torced from the syringe, After the syringe has been used and it is desired to clean the same before relilling it, it isinerely necessary to unscrew the cap and the stem and piston may be withdrawn from the barrel and the piston and` disk 18 unscrewed from the stem. A thorough cleanf ing operation can then be performed and the parts of the syringe reassembled.

Having thus described the invention, I claim:`

1. A syringe comprising an elongated cylindrical barrel open at one end, a nozzle extending from the other end of said barrel and tapered towards its free end, said nozzle being formed with an axially extending bore communica-ting with said barrel, a cap removably engaged with the open end o'l said barrel and formed at its center with an unthreaded opening, a threaded stem slidably passed through the opening ot said cap and provided with a turning head at its outer end, the inner end of said stem terminating adjacent the other end ot said barrel, a disk threaded upon said stem and movable thereon towards and away trom-the inner face o'li the cap, and a piston threaded upon said stein and iitting snugly in said barrel and held against rotation therein. and moved longitudinally therein when the stem is rotated.

Q. A. syringe comprising an elongated cylindrical barrel havingv one end reduced and 'externally threaded, a nozzle extending 'from the other endl of said barrel and tapered towards its tree end, said nozzle being formed with an axially extending bore communicating with said barrel, a cap screwed upon the reduced and threaded end ot said barrel and formed at its center with an unthreaded opening, a threaded stem passed through the opening of said cap and provided with a turning head at its outer end having opposed portions of its marginal tace beveled to 'form flat faces and permit the head to be readily grasped and the stem drawn outwardly, Va disk-threaded upon said stem and movable thereon towards and away from the inner ace of said cap, said disk having opposed marginal portions liattened whereby it may be held and the stem rotated to adjust the disk longitudinally thereon, anda piston threaded' upon said stem and held against rotation in the barrel. n

In testimony whereof l aliix my signature.

LENGE S. MORGAN. [1.. s] 

